package com.itheima.stringdemo;

import java.util.Scanner;

public class stringDemo5 {
    public static void main(String[] args) {
        //键盘录入一个字符串数据，统计字符串中大写字母字符，小写字母字符，数字字符出现的次数

        Scanner sc = new Scanner(System.in);
        System.out.println("请输入一个字符串数据：");
        String str = sc.next();

        //统计，计数器
        int bigCount = 0;
        int smallCount = 0;
        int numberCount = 0;

        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            //System.out.println(c);
            if (c >= 'A' && c <= 'Z') {
                bigCount++;
            }else if(c >= 'a' && c <= 'z') {
                smallCount++;
            }else if(c >= '0' && c <= '9') {
                numberCount++;
            }
        }
        System.out.println("大写字母字符："+bigCount+"个");
        System.out.println("小写字母字符："+smallCount+"个");
        System.out.println("数字字符："+numberCount+"个");
    }
}
